C 559 ] 
'KCHl. EsttraS of a Letter from Mr. Mylius 
of Berlin, to Mr. W. Watfon, F. R. S. 
upon the before-mention d Sub] eEl\ dated at 
Berlin, Auguffc 26, 1752. 
Read^ Dec. /FARCH i 6 patt, at a little part 8 
JLVa in the evening, we had here at 
Berlin a flight earthquake, which manifefted itfelf by 
its fhaking the ground, the windows, and by open- 
ing fotne doors. This before we have had no ex- 
ample of in our country ; and it was perceived at the 
fame time at Stavanger in Norway. I have made 
experiments of collecting the electricity, during a 
thunder-ttorm, with great fuccefs, in company with 
Profeffor Lndolf. He had erected an iron bar, of 
twelve feet long, which was fatten’d upon a pole 
of wood, fifty feet in height, with two tubes of glafs 
cover’d with tin. The upper end of the iron bar was 
fharp-pointed, and near the lower end was fattened a 
very long iron wire, which being carried into a fum- 
mer-houfe, gave great fparks, as the thunder was 
approaching 3 and thefe fparks caufed fometimes as 
violent a fhock through the body, as the experi- 
ment of Leyden. It was alfo continually obferved, 
that the effects were greateft, when the lightning 
was neareft 3 and that, for fome moments after the 
lightning, the effect ceafed, but returned and in- 
crealed by degrees. 
XCIV, 
